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The setting will most likely affect the plot in the way that the power failure will hinder the movie and video games as the girl, her parents and guests are not done yet with the cake and food at the table and as read in the story, they would afterwards watch a new-release movie, and later they girls would play video games until time to go sleep, but now with the power cut they will not be able to do such things because there will not be power for the TV not for the console.
In this chapter, Scout begins to notice that other children in her class have traits and behaviors that she does not understand. Specifically, she becomes angry and judgmental when Walter Cunningham is at her house for dinner, and begins to pour syrup on all of his food. Scout is unaware of Walter's home life, and merely sees this action as him choosing not to act in a way that she believes is right. Atticus and Calpurnia, knowing that Walter does not know any better, remind her that Walter, has had a different upbringing than she has, and has not had many of the opportunities that she has had. When Atticus has this discussion with Scout, he wants her to understand that although people may have their differences, it is important to try and see things from their points of view. This quote is one of the earliest examples of the recurring theme of Scout learning about empathy throughout the novel.